Buggy code:
protected int astLengthPtr ; protected int [ ] astLengthStack ; protected AbstractCommentParser ( Parser sourceParser ) { } protected boolean parseComment ( int javadocStart , int javadocEnd ) { } private void consumeToken ( ) { } protected abstract Object createArgumentReference ( char [ ] name , int dim , Object typeRef , long [ ] dimPos , long argNamePos ) throws InvalidInputException { } protected abstract Object createFieldReference ( Object receiver ) throws InvalidInputException { } protected abstract Object createMethodReference ( Object receiver , List arguments ) throws InvalidInputException { } protected Object createReturnStatement ( ) { } protected abstract Object createTypeReference ( int primitiveToken ) { } private int getEndPosition ( ) { } private int getLineNumber ( int position ) { } private Object parseArguments ( Object receiver ) throws InvalidInputException { } private boolean parseHref ( ) throws InvalidInputException { } private Object parseMember ( Object receiver ) throws InvalidInputException { } protected boolean parseParam ( ) { } protected Object parseQualifiedName ( boolean reset ) throws InvalidInputException { } protected boolean parseReference ( boolean plain ) throws InvalidInputException { Object typeRef = null ; Object reference = null ; int previousPosition = - 1 ; int typeRefStartPosition = - 1 ; nextToken : while ( ( this . index ) < ( this . scanner . eofPosition ) ) { previousPosition = this . index ; int token = readToken ( ) ; switch ( token ) { case TerminalTokens . TokenNameStringLiteral : int start = this . scanner . getCurrentTokenStartPosition ( ) ; consumeToken ( ) ; if ( typeRef != null ) { start = ( this . tagSourceEnd ) + 1 ; previousPosition = start ; typeRef = null ; } if ( verifyEndLine ( previousPosition ) ) { return true ; } if ( ( this . sourceParser ) != null ) this . sourceParser . problemReporter ( ) . javadocInvalidSeeReference ( start , this . lineEnd ) ; return false ; case TerminalTokens . TokenNameLESS : consumeToken ( ) ; start = this . scanner . getCurrentTokenStartPosition ( ) ; if ( parseHref ( ) ) { consumeToken ( ) ; if ( typeRef != null ) { start = ( this . tagSourceEnd ) + 1 ; previousPosition = start ; typeRef = null ; } if ( verifyEndLine ( previousPosition ) ) { return true ; } if ( ( this . sourceParser ) != null ) this . sourceParser . problemReporter ( ) . javadocInvalidSeeReference ( start , this . lineEnd ) ; } return false ; case TerminalTokens . TokenNameERROR : if ( ( this . scanner . currentCharacter ) == '#' ) { consumeToken ( ) ; reference = parseMember ( typeRef ) ; if ( reference != null ) { return pushSeeRef ( reference , plain ) ; } return false ; } break nextToken ; case TerminalTokens . TokenNameIdentifier : if ( typeRef == null ) { typeRefStartPosition = this . scanner . getCurrentTokenStartPosition ( ) ; typeRef = parseQualifiedName ( true ) ; break ; } break nextToken ; default : break nextToken ; } } if ( reference == null ) reference = typeRef ; if ( reference == null ) { this . index = this . tokenPreviousPosition ; this . scanner . currentPosition = this . tokenPreviousPosition ; this . currentTokenType = - 1 ; if ( ( this . sourceParser ) != null ) this . sourceParser . problemReporter ( ) . javadocMissingSeeReference ( this . tagSourceStart , this . tagSourceEnd ) ; return false ; } this . index = ( this . lastIdentifierEndPosition ) + 1 ; this . scanner . currentPosition = this . index ; this . currentTokenType = - 1 ; char ch = peekChar ( ) ; if ( ch == '(' ) { if ( ( this . sourceParser ) != null ) <START_BUG> this . sourceParser . problemReporter ( ) . javadocMissingHashCharacter ( typeRefStartPosition , this . lineEnd , String . valueOf ( this . source , typeRefStartPosition , ( ( this . lineEnd ) - typeRefStartPosition ) ) ) ; <END_BUG> return false ; } if ( ! ( verifySpaceOrEndComment ( ) ) ) { this . index = this . tokenPreviousPosition ; this . scanner . currentPosition = this . tokenPreviousPosition ; this . currentTokenType = - 1 ; int end = ( ( this . starPosition ) == ( - 1 ) ) ? this . lineEnd : this . starPosition ; if ( ( this . source [ end ] ) == '\n' ) end -- ; if ( ( this . sourceParser ) != null ) this . sourceParser . problemReporter ( ) . javadocMalformedSeeReference ( typeRefStartPosition , end ) ; return false ; } return pushSeeRef ( reference , plain ) ; } protected abstract boolean parseReturn ( ) { } protected boolean parseSee ( boolean plain ) { } protected abstract boolean parseTag ( ) { } protected boolean parseThrows ( boolean real ) { } private char peekChar ( ) { } protected void pushIdentifier ( boolean newLength ) { } protected void pushOnAstStack ( Object node , boolean newLength ) { } protected abstract boolean pushParamName ( ) { } protected abstract boolean pushSeeRef ( Object statement , boolean plain ) { } protected abstract void pushText ( int start , int end ) { } protected abstract boolean pushThrowName ( Object typeRef , boolean real ) { } protected char readChar ( ) { } private int readToken ( ) throws InvalidInputException { } private int readTokenAndConsume ( ) throws InvalidInputException { } protected void refreshInlineTagPosition ( int previousPosition ) { } public String toString ( ) { } protected abstract void updateDocComment ( ) { } protected void updateLineEnd ( ) { } private boolean verifyEndLine ( int textPosition ) { } private boolean verifyCharsAfterReturnTag ( int startPosition ) { } private boolean verifySpaceOrEndComment ( ) { } }

Fix:
this . sourceParser . problemReporter ( ) . javadocMissingHashCharacter ( typeRefStartPosition , this . lineEnd , String . valueOf ( this . source , typeRefStartPosition , ( ( ( this . lineEnd ) - typeRefStartPosition ) + 1 ) ) ) ;